You can also exchange it for a new box if you're having technical difficulties. A technician usually installs your cable and cable box, but you can remove a Comcast cable box and return or exchange it by yourself.
Eat vitamin A each day to keep your digestive system healthy. The surface of your digestive tract is made up of mucosal tissues. These tissues secrete compounds that help with digestion -- the mucosal lining in your stomach, for example, secretes stomach acid -- and also absorb the nutrients from your food.
The stomach secretes a number of other important substances including hormones to regulate the functions of the stomach, mucus to protect the gastric lining from damage by acid, and a substance (intrinsic factor) which is necessary for the body to absorb vitamin B12 from the diet.